Well with the extremely limited testing I did, this won't make mnk take off unless boost adds a lot more for a mnk main.

With a 23 mnk subjob, boost bumped tp gain of spirit and soul jump by ~100%. Soul returns ~ 450 for me normally and with boost I got a lil over 900. And did some engagement testing as well. So I think boost is temporarily setting weapon delay to 999 and also adding that to current time until next attack. This is due to long delay until an auto from just activating boost with weapon drawn, but if have to draw weapon get same message that happens when try to redraw a long delay weapon if mob dies after you just swung.

For the damage bonus, I got an extra ~200 damage when used boost with jump. Was against tunnel worms in south gustaberg. I used gae derg+1, hotspur lance, and sword from arke (puk-something or other). All 3 weapons got the 200 damage. Would need to do more intensive testing to pick out things better, though each of the jumps were doing within 30 dmg of each other outside of the obvious crits.(only did 5-10 tests of boost vs unboosted to get an idea of how big of a boost would get)

Any ws or jump cleared the boost buff but delay on attack was still there after the attack.

If mnk gets the same damage when it uses boost I dont think this will fix stuff unless it applies to all hits of ws's like asuran fists, and is more pronounced or it adds a ton to mnks single hit ws's.